4.What will be displayed in the user's browser after the following code executes if the user enters 87 at the prompt?

"use strict"

var getInfo = function() {

grade = parseInt(prompt("What's your score on the test?"));

var newGrade = getResult(grade);

alert("Your grade, curved, is " + newGrade);

};

var getResult = function(grade) {

var newGrade = grade + 5;

return (newGrade);

};

a.an alert will display: Your grade, curved, is 92

b.an alert will display: Your grade, curved, is NaN

c.nothing will display; grade is an undeclared variable

d.nothing will display; newGrade cannot be declared twice